Spraying apparatus



Y J. W. GIBBONS SPRAYING APPARATUS File d-Apri1 17. 192s [:6 ganws Zlf lbbom Patented Aug. 24, 1926.

35138 W. GIBBONS, OF TOPEKA, KANSAS.

armature arrana'rus.

sp nmz n an; April 11, 1925. s w ll'o. 28,101.

This invention relates: to improvements in spraying apparatus. I One object of the invention is to provlde a spraying device or air brush which is efficient in operation, simple in construction and having readily adjustable means whereby the flow of paint, varnish or other material may-bepositively and accurately controlled. v

Other objects and advantages will be aparent from a consideration of the followmg specification and accompanying draw-' ings, wherein I ig. 1 is a side view of my invention. Fig. 2 is an end view thereof.

Fig. 3 is a lon 'tudinal sectional view. Fig. 4 is an-en view with the nozzle removed, and v Fig. 5 is a uarter sectional view of a modified-form o nozzle. 3 In the drawings, is the barrel or body of the apparatus, exteriorly threaded at the forward and rear'ends 11 and 12, respectively.

Intermediate the ends the body 10 is provided with a pair of integral oppositely disposed extensions or bosses 13 and 14, each of which is centrally bored and threaded, as shown in Fig. 3. The bore of extension 13 constitutes the intake of the body for paint, varnish or other liquid with which'the device is used. The bore of ex- ..tension 14 is normally closedbyscrew plu 14 which may be removed, when desire for cleaning purposes. I

, The bores of theextensions 13 and .14 communicate with distributing chamber 15 from which extend the ducts '16 which terminute at the shoulder 17 formed byIreducing the end '11 of the barrel to. form the projection 18.- The dutts .16 are shown as being four in number, but more or fewer thereof may. be provided, if desired. The forward end of projection 18 is beveled or 'chamfered, as shown at 18". Anozzle 19 is internally chambered at 19'- and is threaded for screwing on the end 110i the barrel10. The forwardend of the nozzle 4-19 is redueedin-diameter, as shown, and fha'sthefopening 20'thereinthiough which the liquid is diseharged.-. The c .20, at its rear, has ac'onlcal wall 21 whi eosuppl operates with the 'chamfered end 18' of extension 18 to form a valve for the regulation of the flow of liquid into .the discharge opening. By turning the nozzle 19 relatively to the barrel 10 the flow of liquid can be increased or restricted to any desired extent, as will be clear. The nozzle is prefer- .abl knurled, as shown in Fig. 1.

e aint, varnish or other liquid is drawn throng the device, as above described, by

means of air from a source of su ly under pressure. The air entersthe I rrel 10 4 through the intake bore in the extens'ion'or boss 22 WhlCh is threaded for connection 'Wlth a flexible supply conduit, not shown.

The air passes into the lon itudinal air duct 23 extending the len h o the barrel 10, as

shown in Fig. 3. T e duct 23 is' enlarged throughout a portion of its length and receives the threaded valve stem 24 which closes the rear of duct 23 and terminates in a tapered end 24 adapted to coact with the 'conical wall 23" of the duct 23 to form a needle valve for regulating the flow of air through said duct, said valve being indicated, generally, by numeral 25. The .stem 24 has an operating handle 26 by means of .which the valve may be regulated. An apertured, threaded nut 27 closes the upper end of the barrel 10.

- It will be seen that when the valve is open air under pressure from-the source of (not shown) will pass into duct 23 and t rou h outlet opening 20 in nozzle 19.- The rapid y flowin air willproduce a.si-.

honic efiect upon 0 amber. 19" whereby the;

iquid, such as paint or the like is caused to flow from the source of supply throu h th'educts 16 into chamber 19"}, through t e restricted opening betweenthe wall 21 and chamferedv end 18 of projection 18.. The j action of the air in drawing the .fluid through the ducts and openings of the de-I vice thoroughly atoinizes the same and carries it" through the outlet 20 of the nozzle 19 in the form of a fine spray. The atomiz- 1 ing efiect and flow of liquid can be controlled or-regulated by the adjustment of the 'airby means of valve 25 and by re the flow of liquid by means of the a justable ating nozzle 19, aswill be clear. .-It will be understood that the pressure or gravity, if desired.

'. nal air duct t In Fig. 5, I have shown a modified form of nozzle which may be substituted forthe nozzle 19 when" desired. 7 The nozzle 28 of Fig. 5 differs from nozzle 19 in that the outlet 29? of the former is formed with a.

flaring or conical internal wall 29*, as shown. Nozzles of other shapes may be provided for s eoial uses which will be readily intercliangeable with those above described.

Although I have shown and described certain features of .m invention for purposes of illustration, it'will be understood that various changes may be made therein without departing from the spirit of the invention, for instance, the trig er valve, such as. that shown in my Patent 0. 1,504,443 of August 12, 1924, may-be. substituted for the valve stem 24, and andle 26, shown and described herein.

What I claim as new is:

1. A device of the class described com prising a bod nal air duct erein, a valve for controlling the flow of air therethrough, from a source of sup 1 under pressure a liquid sup ly duct fdi'llied in said bod terminating adiacent the forward end 0 said member, and a nozzle enclosing the forward ends of said air and liquid duct, said duct bein so disposed with reference to said liquid supply duct that air passing through said air duct produces a siphonic effect on the liquid in said liquid suppl duct.

- 2; A device 0 the class described comprising a bed memberhaving a longitudierein, a valve for oontrollin the flow of air therethrough, said body member having a reduced forward portion fo' a shoulder, said air duct extending through said portion, a liquid supply duct formed in said bod terminating at said shoulder, and an ad uStabIe nozzle member enclosing the outlet ends of both of said ducts for regulating the flow' of liquid liquidsupgily duct formed in sai throu h said nozzle.

{3. device of the class described com prising a body, an air duct therein, a valve for controlling the flow of air therethrough from a source of supply under body ternnnatmg s ort of the forward end thereof,

and a' nozzle member enclosing the outlet ends of both said ducts and being adapted to control the flow liquid duct.

4. A device. of the class described comprisin a body portion, an air duct therein, a valve $01 regulating the flow of airthrough duct in said body termimember having a longitudi-.

'lIlg chamber in said bo liquid is drawn ressure, a c

let of said air duct, said no of liquid through said ti. A device of the class described comprising albody member, an air duct therein having its outlet at the forward end of saidthe flow of member, a valve for regulatin air through said duct, a liquid supply duct in said member terminating adjacent the outlet of said air duct, and a nozzle enclosing the outlets of both said ducts and having a chamberthrou h which liquid from said liquid duct is drawn by air flowing from the outlet of said air duct.

. A device of the class described comprismg a body member, an air duct therein aving its outlet at the forward end of said member, a valve for regulatin the flow of air through said duct, a liquif formed in said member terminatlng adjacent the outlet of said air duct, and a nozzle enclosing the outlets of bothsaid ducts and having a chamber through which li uid from said liquid duct is drawn by air owing from the outlet of said air duct, said adjustable to vary the flow of 1 nozzle being liquid therethrough.

supply duct v I 7. A deviceof the class described som prising a body aving its outlet at the forward end Of'said member, a liquid intake 8. liquid distributy member in communication with said intake, liquid ducts extendin forwardly from said chamber and terminating adjacent the forward end ofsaid body, and an adjustable nozzle member enclosing the outlets of said air and H uid g ducts and having a chamber through w 'ch let of said airduct.

, 8. A device of. the class described comprising a body member, an air duct therein aving its outlet at the forward end of said member, a liquid intake, a liquid distributing chamber in said body member in comby air flowing from the outmember, an air duct therein 1 munication with said intake, liquid ducts extending forwardly from said chamber and terminating adjacent the forward end of said body, and an adjustable nozzle member enclosing the outlets of said air and-1i uid ducts and having a chamber through w 'ch liquid isdrawn by air flowin from the oute being adjustable to vary theflow of liquid therethrough.

9. A device of the class described -comprising a body member'vhaving an air duct and liqlutid ducts formed therein, a valve H control g the flow of air duct, and a nozzle enclosin ends of both said ducts, said adjustable for controlling the flow of liqu through said liquid duct.

tirog him said t e we urge nozzlebei ii 10; A device of the class'described com body member, said body being provided Q with an aperture providing access for clean g said chamber and ducts, and a elosing member for aperture 1g In testimony whereof, I have subscribed myname.

JAMES w. GIBBONSYQ 

